publications
Walsh, E., D.L. Armstrong, J. Napier, L.G. Simmons, M. Korte and J. Mcgee. 2008. Acoustic communication in Panthera tigris: A study of tiger vocalization and auditory receptivity revisited. Acoustical Society of Amer. Miami, Fl.

Galeota, J., Napier, J.E., DVM, Armstrong, D.L., DVM and D. Rogers. 2007. Herpesvirus infections in rock hyraxes (Procavia capensis). Amer. Assoc. Vet. Lab. Diag. Reno, Nevada.

Napier, J.E. DVM, N. M. Loskutoff, PhD, S. M. Dankof, L.G. Simmons, DVM and D.L. Armstrong, DVM. 2007. Preliminary data for comparison of carfentanil-xylazine and thiafentanil-medetomidine in electroejaculation of captive gaur (Bos frontalis gaurus). Proc. Am. Assoc. Zoo Vet. Pp. 49 - 50.

Perpinan, D, LV, MSc., J. Martinez, LV., PhD., C. Lopez, LV., E. Carpintero, LV., F. Bargallo, LV., M. Reinacher, Dr. Med. Vet, Dipl. ECVP and A. Ramis, LV., PhD, Dipl ECVP. 2007. Novel viral syndromes in ferrets. Proc. Am. Assoc. Zoo Vet. Pp. 208 - 209.

Zurawka, Heidi S., DVM, Aimee L. Berliner, DVM, Mark L. Hofling, and Stephanie B. James, DVM, Dipl ACZM. Evaluation of three different anesthetic delivery systems in Indian peafowl (Pavo cristatus). Proceedings American Association of Zoo Veterinarians, 2007. Pages 166-167.

Armstrong, D.L., Teaching Tiger: Veterinary Medicine and Technology Transfer in the Conservation of Tigers. Connect, September, 2006. pp 8-10.

Graham, L.H., Byers, A.P., Armstrong, D.L., Loskutoff, N.M., Swanson, W.F., Wildt, D.E. and Brown, J.L. (2006) Natural and gonadotropin-induced ovarian activity in tigers (Panthera tigris) assessed by fecal endocrine analysis. General and Comparative Endocrinology 147:362-370.

Quigley, K.S. and D.L. Armstrong. Tiger management workshop. Primorskaya State Academy of Agriculture, Ussuriisk, Primorskiy Krai, Russia, April 7-22, 2006

Raphael, Bonnie L., DVM, Dipl ACZM, Julie White, DVM, Dipl ACVP, Charolotte Kirk Baer, MS, Stephanie B. James, DVM, Dipl ACZM, Robert P. Moore, DVM, Dipl ABVP-Avian, Kristine M. Smith, DVM, Heidi S. Zurawka, DVM, Paul P. Calle, VMD, Dipl ACZM, and Robert A. Cook, VMD, MPA. “Vitamin E deficiency in multiple species being fed a commercial supplement." Proceedings American Association of Zoo Veterinarians, 2006. Page 13.

Zurawka, Heidi S., DVM, Julie White, DVM, Dipl ACVP, Bonnie L. Raphael, DVM, Dipl ACZM, Paul P. Calle, VMD, Dipl ACZM, Robert P. Moore, DVM, Dipl ABVP-Avian, Kristine M. Smith, DVM, and Stephanie B. James, DVM, Dipl ACZM. “A retrospective study of morbidity and mortality in pudu (Pudu puda) at the Bronx Zoo: 1983-2005." Proceedings American Association of Zoo Veterinarians, 2006. Page 59.

Mercado, J.A., T.G. Curro, D.L. Armstrong and G.E. Duhamel. Colitis in captive tamarins displayed on semi-natural substrate in a mixed species exhibit in a North American zoo. Proceedings of the American Association of Zoo Veterinarians, October 14-21, 2005

Napier, J.E., DVM and T. Moore, DVM. 2005. Chronic Renal Failure and Nephrolithiasis in a two-toed sloth (Choloepus didactylus). Proc. Am. Assoc. Zoo Vet. Omaha, NE. Pp. 83 - 86.

Napier, J.E., DVM, S. Murray, DVM, Dipl. ACZM, M. Garner, DVM, Dipl. ACVP, T. Viner, DVM, Dipl. ACVP and H. Murphy, DVM. 2005. Uterine leiomyomas in three captive eastern bongo (Tragelaphus euruci isaaci). J. Zoo. Wildl. Med. 36: 709-711

Zurawka, Heidi S., “Case report: Gastrointestinal linear foreign bodies in three ebony langurs Trachypithecus auratus." Proceedings Association of Primate Veterinarians (APV) 2005 Annual Workshop, St. Louis, Missouri. (Trainee Travel Grant Award Recipient)

Armstrong, D.L. and L. J. Gage. Very Basic Big Cat Medicine. American Association of Zoo Veterinarians, Wildlife Disease Association and American Association of Wildlife Veterinarians Joint Meeting, August 27-September 3, 2004.

Armstrong, D.L., Crichton, E.G., Dankof, S.M., Schwalbach, L.M.J., Gardner, D.K. and Loskutoff, N.M. (2004) Ovarian stimulation, laparoscopic oocyte retrieval, IVF and blastocyst production using sequential media in the African lion (Panthera leo). Reproduction, Fertility and Development (in press).

Armstrong, D.L., K. Morfeld, A.H. Lewandowski, G. Dumonceaux and K. Quigley. Siberian Tiger (Panthera tigris altaica) species survival plan update. Proceedings of the American Association of Zoo Veterinarians, Wildlife Disease Association and American Association of Wildlife Veterinarians Joint Meeting, August 27-September 3, 2004. 2004

Armstrong, D.L. Veterinary Related Issues. In The Tiger Species Survival Plan (SSP) Report 2003, Felid Taxon Advisory Group (TAG) Mid-Year Meeting. Albuquerque, New Mexico. April 8, 2004. pp 8-12.

Curro, T.G., D. Okeson, D. Zimmerman, D.L. Armstrong and L.G. Simmons. Xylazine-midazolam-ketamine versus medetomidine-midazolam-ketamine anesthesia in captive Siberian Tigers (Panthera tigris altaica). Journal of Zoo and Wildlife Medicine. 35 (3) pp 320- 327, 2004

Graham, L.H., Byers, A.P., Armstrong, D.L., Loskutoff, N.M., Swanson, W.F., Wildt, D.E. and Brown, J.L. 2006. Natural and gonadotropin-induced ovarian activity in tigers (Panthera tigris) assessed by fecal endocrine analysis. General and Comparative Endocrinology 147: 362-370.

Murphy, H., DVM, S. O’Keefe CVT, and J. E. Napier, DVM. 2004. Recapture of an Escaped Western Lowland Gorilla at the Franklin Park Zoo. Rocky Mountain Gorilla Workshop Proc., Calgary Zoo, Calgary, Alberta, Canada.

Quigley, K.S., D.M. Zimmerman and D.L. Armstrong. Tiger management workshop. Primorskaya State Academy of Agriculture, Ussuriisk, Primorskiy Krai, Russia, November 30- December 5, 2004

Zimmerman, D.M., D.L. Armstrong, T.G. Curro, S.M. Dankoff, K.W. Vires, K.K. Cook, N.D. Jaros and M.G. Papich. Pharmacokinetics of Florfenicol after a single intramuscular dose in White-Spotted Bamboo Sharks (Chiloscyllium plagiosum). Proceedings of the American Association of Zoo Veterinarians, Wildlife Disease Association and American Association of Wildlife Veterinarians Joint Meeting, August 27-September 3, 2004.

Armstrong, D.L. Disease risk assessment- essential tool for conservation. Zoos' Print Journal, 18 (5), 1-6. 2003

Crichton, E.G., E. Bedows, A.K. Miller-Lindhom, D.M. Baldwin, D.L. Armstrong, L.H. Graham, J. Ford, J.O. Gjorret, P. Hyttel, C.E. Pope, G. Vajta and N.M. Loskutoff. The efficacy of porcine gonadotropins for repeated stimulation of ovarian activity for oocyte retrieval and in vitro embryo production and cryopreservation in Siberian tigers (Panthera tigris altaica). Biology of Reproduction 68, 105-113. 2003

Simmons, H.A., D.J. Steffen, D.L. Armstrong and D.G. Rogers. Parelaphostrongylus tenuis in captive pronghorn antelope (Antilocapra Americana) in Nebraska. Journal of Wildlife Diseases, 38 (4), 822-825, 2003

Walsh, E.J., D.R. Ketten, L.M. Wang, D.L. Armstrong, T. Curro, L.G. Simmons and J. McGee. Bioacoustics in Panthera tigris. Society of Neuroscience, 33rd Annual Meeting, New Orleans, LA, USA, November 8-12, 2003.

Walsh, E.J., D.R. Ketten, L.M. Wang, D.L. Armstrong, T. Curro, L.G. Simmons and J. McGee. Bioacoustics in Panthera tigris- Hearing and Voice in a Solitary Hunter. First In ternational Conference on Acoustic Communication by Animals. University of Maryland, College Park, MD, USA. July 27-30, 2003.

Walsh, E. J., J. McGee, D.L. Armstrong, T. Curro, L. Song, E. Firbas and N. Feldbauer. Hearing in exotic felids. Assoc. Res. Otolaryngolol. 2003. 26:44

Armstrong, D.L. Tigers, habitat fragmentation and the future potential application of reproductive technology to conservation of the species. Proceedings of the 2nd International Symposium on Assisted Reproductive Technology for the Conservation and Genetic Management of Wildlife, Henry Doorly zoo, Omaha, NE, USA, Sept. 28-29, 2002

Armstrong, D., R. Jakob-Hoff and U.S. Seal (Editors). Animal Movements and Disease Risk: A Workbook. 4th edition. Conservation Breeding Specialist Group (SSC/IUCN), Apple Valley, MN. 2002

Gjorret, J.O., E.G. Crichton, N.M. Loskutoff, D.L. Armstrong and P. Hyttel. Ultrastructure of oocyte maturation, fertilization and early embryo development in-vitro in the Siberian tiger (Panthera tigris altaica) Molecular Reproduction and Development 63:79-88. 2002

Armstrong, D. and U.S. Seal (Editors) DISEASE RISK WORKSHOP III, White Oak: Report. June 28-30, 2001. Conservation Breeding Specialist Group (SSC/IUCN), Apple Valley, MN 2001

Hammer, C.J., H.D. Tyler, N.M. Loskutoff, D.L. Armstrong, D.J. Funk, B.K. Lindsey and L.G. Simmons. Compromised development of calves (Bos gaurus) derived from in vitro-generated embryos and transferred interspecifically into domestic cattle (Bos taurus). Theriogenology 55:1447-1455. 2001

Houser, D., L. Simmons, and D. Armstrong. Treatment of an abscessed foot pad of an African Elephant (Loxodonta africana) using a sandal and topically applied chitosan. In The Elephant’s Foot, Iowa State University Press pp 107-114. 2001

Quigley, K.S., D. Armstrong, D.G. Miquelle, J.M. Goodrich and H.B. Quigley. Health Evaluation of Wild Siberian Tigers (Panthera tigris altaica) and Amur Leopards (Panthera pardus orientalis) in the Russian Far East. Proceedings of the American Association of Zoo Veterinarians. September 18-23, 2001. Pp 179-182. 2001

Quigley, K.S., D.L. Armstrong, R. Cook, J. Goodrich, D.G. Miquelle, R.E. Miller and D.L. Janssen. The role of Veterinary Science in Tiger Conservation Issues in Southeast Asia and Russia. Veterinary Conservation Biology: Wildlife Health Management in Australasia, Taronga Zoo, Sydney, Australia. July 2-6, 2001.

Zurawka, Heidi S., DVM, “A Case Report: Metabolic Bone Disease in a Bald Eagle." Proceedings National Wildlife Rehabilitators Association (NWRA) Conference, Lake Tahoe, Nevada, March 2001.

Armstrong, D. and U.S. Seal (Editors). DISEASE RISK WORKSHOP II, New Orleans: Report. September 13-15, 2000. Conservation Breeding Specialist Group (SSC/IUCN), Apple Valley, MN. 2000

Armstrong, D. and Seal, U.S. (Editors) DISEASE RISK WORKSHOP: FINAL REPORT. Omaha, NE March 30- April 1, 2000. Conservation Breeding Specialist Group (SSC/IUCN), Apple Valley, MN: 1- 136 (2000)

Crichton, E.G., Armstrong, D.L., Vajta, G., Loskutoff, N.M. Developmental competence in-vitro of embryos produced from Siberian tigers (Panthera tigris altaica) cryopreserved by controlled rate freezing versus vitrification. THERIOGENOLGY 53:328 (2000)

Gjorret, J.O., Crichton, E.G., Armstrong, D.L., Loskutoff, N.M., Hyttel, P. Oocyte maturation, fertilization and early embryonic development in-vitro in the Siberian tiger (Panthera tigris altaica) THERIOGENOLOGY 53:334 (2000)

Loskutoff, N.M., Armstrong, D.L., Ohlrichs, C.L., Johnson, D.L., Funk, D.J., Van Roekel, P.V., Molina, J.A., Lindsey, B.R., Looney, C.R., Bellow, S.M., Hammer, C.J., Tyler, H.D., Simmons, L.G. Transvaginal ultrasound-guided oocyte retrieval and the developmental competence of in-vitro produced embryos in-vitro and in-vivo in the gaur (Bos gaurus). THERIOGENOLOGY 53:337 (2000)

Morato, R.G., Crichton, E.G., Paz, R.C.R., Zuge, R.M., Moura, C.A., Nunes, A.L.V., Teixeira, R.H., Porto, L., Priscila, M.A.B.V., Guimaraes, S.H.R., Correa, S.H.R., Barnabe, R.C ., Armstrong, D.L., Loskutoff, N.M. Ovarian stimulation and successful in-vitro fertilization in a jaguar (Panthera onca). THERIOGENOLOGY 53:339 (2000)

Seal, U.S. and Armstrong, D.L. (Editors) CONSERVATION ASSESSMENT AND MANAGEMENT PLAN (CAMP) FOR ARABIAN CARNIVORES AND POPULATION AND HABITAT VIABILITY ASSESSMENT (PHVA) FOR THE ARABIAN LEOPARD AND TAHR: FINAL REPORT. Sharjah, United Arab Emirates, February 5-11, 2000, Conservation Breeding Specialist Group (SSC/IUCN) Apple Valley, MN: 1-237 (2000)

Nelson, K.L., Crichton, E.G., Doty, L., Volenec, D., Finnegan, J.M., Morato, R.G., Pope, C.E., Dresser, B.L., Armstrong, D.L., Loskutoff, N.M. Heterologous and homologous fertilizing capacity of cryopreserved felid sperm: a model for endangered species. THERIOGENOLOGY 51:290 (1999)

Armstrong, D. and O. Byers. Western Prairie Fringed Orchid PHVA. CBSG News. (1998) Vol. 9, No.1, pp 6-7.

Armstrong, D. Chemical and Physical Restraint of Cats and Hoofstock; Disease Prevention and Health Maintenance; Reproductive Research and Application. Lectures at SACAVET VIII, College of Veterinary Medicine, University of Sao Paulo, Sao Paulo, Brazil; May 5- 7, 1998.

Armstrong, D. Veterinary Medical Summary.Masterplan Harimau Sumatera Indonesia (Panthera tigris sumatrae). Indonesian Zoological Parks Association, Jakarta, Indonesia, (April, 1998): 39-43.

Houser, D., Simmons, L. and D. Armstrong. The successful recovery of the abscessed foot pad of an African elephant (Loxodonta africana), with particular attention given to two treatment elements: the use of a sandal and topically applied chitosan. First North American Conference on Elephant Foot Care and Pathology, Portland, Oregon, March 20-21, 1998.

Napier, J.E. and P.L. Wolff. 1998. Guidelines for chemical use protocol in animal areas at Disney’s Animal Kingdom. Proc. Am. Assoc. Zoo Vet. Omaha, NE. Pp. 524.

Armstrong, D. and R. E. Miller. South China tiger medical report and recommendations. Third Meeting of the South China Tiger Committee of the Chinese Association of Zoological Gardens. November 19, 1997.

Armstrong, D., M. Fritz and O. Byers (Editors.). Population and Habitat Viability Assessment Workshop for the Western Prairie Fringed Orchid (Platanthera praeclara): Final Report. Conservation Breeding Specialist Group, Apple Valley, MN (1997): 1-127.

Armstrong, D., Simmons, L., Morris, D., Cassidy, D., Loskutoff, N., Brown, C. and E. Louis. Benefits to Omaha’s Henry Doorly Zoo from participation in the Conservation Breeding Specialist Group processes. Conservation Breeding Specialist Group Annual Meeting, August 14-17, 1997.

Chrisman, Cheryl, L., DVM, MS, EdS; Michael Walsh, DVM; John C. Meeks, DVM; Heidi Zurawka, DVM; Richard LaRock, DVM; Larry Herbst, DVM, PhD; Juergen Schumacher, Dr Med Vet. “Neurologic examination of sea turtles." Journal of American Veterinary Medical Association, October 15, 1997.

Masangkay, J.S., Armstrong, D., Citino, S., Escalada, R., Solis, C., Flor, J.A.C.G., Toledo, S., Amido, G. and R. Callo. Chemical immobilization of the tamaraw (Bubalus mindorensis) for semen collection. Proceedings of the Veterinary Practitioners Association of the Philippines, June 19-20, 1997.

Roth, T.L., Armstrong, D.L., Barrie, M.T. and D. E. Wildt. Seasonal effects on ovarian responsiveness to exogenous gonadotrophins and successful artificial insemination in the snow leopard ( Uncia uncia ). Reprod. Fertil. Dev., 1997, 9, pp 285-295.

Tilson, R., Siswomartono, D., Manansang, J., Brady, G., Armstrong, D., Traylor-Holzer, K., Byers, A., Christie, P., Salfifi, A., Tumbelaka, L., Christie, S., Richardson, D., Reddy, S., Franklin, N. and P. Nyhus. International cooperative efforts to save the Sumatran tiger (Panthera tigris sumatrae). In International Zoo Yearbook (1997) Vol. 35: pp 129-138

Armstrong, D., Miller, R., Byers, O., Brady, G., Traylor-Holzer, K. and R.Tilson. International cooperation with range country efforts to conserve tigers (Panthera tigris) and the veterinarians role. Proceedings of the American Association of Zoo Veterinarians Annual Conference, November 3-8, 1996: pp 532-553

Brown, C., Wallner-Pendleton, E., Armstrong, D., Carlson, M. and L. Cuevas. Lead poisoning in captive Gentoo penguins (Pygoscelis papua papua). Proceedings of the American Association of Zoo Veterinarians Annual Conference, November 3-8, 1996: pp 298-301.

de Leon, J., Lawas, N., Escalada, R., Ong, P., Callo, R., Hedges, S., Ballou, J., Armstrong, D. and Seal, U.S.(Editors). Tamaraw (Bubalus mindorensis) Population and Habitat Viability Assessment Report. IUCN/SSC Conservation Breeding Specialist Group: Apple Valley, MN (1996).

Donoghue, A., Byers, A., Johnston, L., Armstrong, D. and Wildt, D. Timing of ovulation after gonadotrophin induction and its importance to successful intrauterine insemination in the tiger (Panthera tigris). Journal of Reproduction and Fertility (1996) 107: pp 53-58.

Manansang, J., Purwantara, B., Gepak, V.H., Masnur, I.Y., Sutarman, Bleyenberg, K., Varadarajulu, R., Hori, H., Duryadi, D. and Armstrong, D. Anoa captive population status and management. In Population and Habitat Viability Assessment Workshop for the Anoas (Bubalus depressicornis and Bubalus quarlesi) Report, Conservation Breeding Specialist Group (SSC/IUCN): Apple Valley, MN (1996): pp. 59-82.

Tilson, R., Armstrong, D., Miller, E., Byers, A., Traylor-Holzer, K., Brady, G., Menghu, W. and Zhong, X. Medical, Reproductive and Management Evaluation of South China Tigers in China. Minnesota Zoo: Apple Valley, MN, 1996: 1-88.

Armstrong, D. Captive Wild Cattle Immobilization Protocol. In Asian Wild Cattle Conservation Assessment and Management Plan Working Document. IUCN/SSC Conservation Breeding Specialist Group: Apple Valley, MN (1995): pp 37-44.

South China Tiger Studbook Analysis & Masterplan, November, 1995

Armstrong, D. Physical and medical evaluation report. In Indochinese Tiger Masterplan for Thailand, Minnesota Zoo: Apple Valley, MN (1995): pp 27-28.

Shiewe, M., Loskutoff, N., Durrant, B., Johnston, L., Armstrong, D. and Simmons, L. Gaur sperm cryopreservation trial: analysis of packaging type and rapid freezing method for potential field application. Theriogenology (1994) 41: p 291

Tilson, R., Brady, G., Traylor-Holzer, K. and Armstrong, D. (Editors) Management and Conservation of Captive Tigers, Minnesota Zoo: Apple Valley, MN (1994): 1-136.

Wilson, S., Armstrong, D., Simmons, L., Morris, D. and Gross, T. A clinical trial using three regimens for immobilizing gaur (Bos gaurus). Journal of Zoo and Wildlife Medicine (1993) 24(2): pp 93-101.

Sumatran Tiger Regional Captive Breeding Workshop, Taman Safari, Indonesia, November 17-19, 1992.

Armstrong, D. and Gross, T., (Editors). Proceedings of the Wild Cattle Symposium, Henry Doorly Zoo, Omaha, Nebraska, June 13-16, 1991.

Godfrey, R., Lunstra, D., French, J., Schwartz, J., Armstrong, D. and Simmons, L. Estrous synchronization in the gaur (Bos gaurus): behavior and fertility to artificial insemination after prostaglandin treatment. Zoo Biology (1991) 10: pp 35-41.

Gross, T., Tharnish, T., Patton, M., Armstrong, D. and Simmons, L. Gaur semen cryopreservation: comparison of cryodiluents and freezing procedures. In Proceedings of the Wild Cattle Symposium, Omaha, Nebraska, June 13-16, 1991. pp 17-32

Donoghue, A., Johnston, L., Seal, U., Armstrong, D., Tilson, R., Wolf, P., Petrini, K., Simmons, L., Gross, T. and Wildt, D. In-vitro fertilization and embryo development in-vitro and in-vivo in the tiger (Panthera tigris). Biology of Reproduction (1990) 43: pp 773-744.

Armstrong, D. An evaluation of carfentanil as an immobilizing agent for gaur (Bos gaurus). Proceedings of the American Association of Zoo Veterinarians Annual Conference, 1989: p 8.

Armstrong, D., Montali, R., Doster, A. and Kazacos, K. Cerebrospinal nematodiasis in macaws due to Baylisascaris procyonis. Journal of the American Association of Veterinarians (1989) 20: pp 354-359.

Doster, A., Armstrong, D. and Bargar, T. Seminoma and parathyroid adenoma in a snow leopard (Panthera uncia). Journal of Comparative Pathology (1989) 100: pp 475-480.

Hopkins, S., Armstrong, D., Hummel, S. and Junior, S. Successful cryopreservation of gaur (Bos gaurus) epididymal spermatazoa. Journal of Zoo Animal Medicine (1989) 19: pp 195-201.

Schwartz, J., French, J., Godfrey, R., Hruska, R., Simmons, L. and Armstrong, D. Estrogen, progesterone and luteinizing hormone levels in gaur (Bos gaurus) serum during the estrous cycle. Nebraska Academy of Sciences Annual Meeting, April 14-15, 1989.

Simmons, L., Armstrong, D. and Vires, C. A chute management system for gaur (Bos gaurus). Proceedings of the American Association of Zoological Parks and Aquariums Central Regional Conference, 1989.

Simmons, L., Junior, S., Armstrong, D., Hopkins, S. and Hummel, S. Techniques for collection and cryopreservation of gaur (Bos gaurus) semen. Proceedings of the American Association of Zoological Parks and Aquariums Central Regional Conference, 1989.

Godfrey, R., Lunstra, D., Simmons, L., Armstrong, D., Schwartz, J. and French, J. Validation of a radioimmuno-assay for luteinizing hormone in gaur (Bos gaurus) serum and observations of behavior around estrus. Proceedings for the Fifth World conference on Breeding Endangered Species in Captivity (1988).

Armstrong, D., Montali, R., Kazacos, K. and Doster, A. Cerebrospinal nematodiasis in blue and gold macaws and scarlet macaws associated with Baylisascaris procyonis. Proceedings of the First International Conference on Zoological and Avian Medicine (1987): pp 489-490.

Seal, U., Armstrong, D. and Simmons, L. Yohimbine hydrochloride reversal of ketamine hydrochloride and xylazine hydrochloride immobilization of Bengal tigers and effects on hematology and serum chemistries. Journal of Wildlife Diseases (1987) 23(2): pp 296-300.